1. 1Unit of Integrative Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
2. 2Division of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.
3. 3Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
4. 4Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden.
5. 5Clinical Epidemiology Division, Department of Medicine, Karolinska Institutet, Solna, Sweden.
6. 6Department of Epidemiology and Public Health, University College London, London, United Kingdom.
7. 7Centre of Public Health Sciences Faculty of Medicine, University of Iceland, Reykjavík, Iceland.
8. 8Center for Translational Microbiome Research, Department of Microbiology, Tumour and Cell Biology, Karolinska Institutet, Science for Life Laboratory, Solna, Sweden.